GO:1901679 nucleotide transmembrane transport: Transport Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1901679 nucleotide transmembrane transport is defined as the directed movement of a nucleotide across a membrane.
• Nucleotides cross membranes through dedicated transporters and channels, including ABC transporters, mitochondrial carriers, and CFTR [1,2,3,4].
• CFTR functions as a nucleotide transport pathway, linking nucleotide movement to epithelial physiology [1,3].
• Mitochondrial metabolite transport involves nucleotide carriers that exchange nucleotides across the inner membrane.
• Defects in nucleotide transmembrane transport contribute to diseases such as cystic fibrosis and mitochondrial disorders [1,4].
• CRISPR knockout, knock-in, and overexpression models enable functional dissection of nucleotide transporters [5,6,8].
Description
Nucleotide transmembrane transport (GO:1901679) describes the directed movement of nucleotide molecules across a biological membrane. Nucleotides are essential for nucleic acid synthesis, energy transfer, and signaling, and their distribution across cellular compartments is tightly controlled by transport proteins. This process is fundamental to mitochondrial function, epithelial secretion, and cellular metabolism [1,4]. Researchers study nucleotide transmembrane transport to understand how cells maintain nucleotide homeostasis and how transport defects lead to disease [1,4]. The cystic fibrosis transmembrane conductance regulator (CFTR) is a well-characterized example of a protein that conducts nucleotides across membranes, linking this transport process to ion and fluid regulation in epithelia [1,3]. Mitochondrial carriers similarly mediate nucleotide exchange across the inner mitochondrial membrane, supporting oxidative phosphorylation and nucleotide salvage. Given its broad physiological importance, nucleotide transmembrane transport is a target for genetic and pharmacological studies [1,4].
nucleotide transmembrane transport At A Glance
| GO ID | GO:1901679 |
|---|---|
| GO term | nucleotide transmembrane transport |
| Ontology | biological_process |
| Synonym | nucleotide membrane transport |
| Definition | The directed movement of nucleotide across a membrane. |
| Major function | Translocation of nucleotides across biological membranes |
| Related transporters | CFTR, mitochondrial carriers, ABC transporters |
| Disease relevance | Cystic fibrosis, mitochondrial disorders |
What Is GO:1901679?
GO:1901679 nucleotide transmembrane transport is the biological process in which nucleotides are moved across a membrane in a directed manner. This includes transport into or out of organelles, cells, or membrane-bound compartments, and is mediated by specific transporter proteins or channels [1,4].
Why Is nucleotide transmembrane transport Important in Cell Biology?
Nucleotide transmembrane transport is critical for maintaining cellular nucleotide pools, supporting mitochondrial metabolism, and enabling epithelial secretion [1,4]. Dysregulation of this process is linked to diseases such as cystic fibrosis and mitochondrial dysfunction [1,4]. Understanding the molecular players and regulatory mechanisms provides insights into basic cell biology and potential therapeutic targets [1,4].
• Maintains nucleotide homeostasis across cellular compartments.
• Supports mitochondrial energy metabolism and nucleotide salvage.
• CFTR-mediated nucleotide transport influences epithelial ion and fluid balance [1,3].
• Defects in nucleotide transporters are associated with cystic fibrosis.
• Mitochondrial carrier dysfunction leads to metabolic disorders.
• Provides targets for pharmacological modulation of nucleotide-dependent processes [1,4].
• Enables study of membrane protein structure-function relationships [1,4].
• Relevant to cancer metabolism and nucleotide availability.
• Impacts drug transport and resistance through ABC transporters.
• Facilitates CRISPR-based disease modeling of transport defects [5,6,8].
What Happens During nucleotide transmembrane transport?
Substrate Recognition and Binding
In simple terms: The transporter first grabs the nucleotide it needs to move.
Transport proteins such as CFTR and mitochondrial carriers recognize specific nucleotides through binding pockets that confer selectivity [1,4]. This initial binding step ensures that only the correct nucleotide is transported across the membrane [1,4].
Conformational Change and Translocation
In simple terms: The transporter changes shape to push the nucleotide through the membrane.
Upon nucleotide binding, transporters undergo conformational changes that move the substrate across the lipid bilayer [1,4]. For CFTR, nucleotide transport is coupled to its channel activity, allowing movement down a concentration gradient [1,3].
Release and Reset
In simple terms: The nucleotide is released on the other side, and the transporter resets.
After translocation, the nucleotide is released into the target compartment, and the transporter returns to its initial state to begin another cycle [1,4]. This cycle is regulated by cellular signals and energy status [1,4].
Coupling to Cellular Processes
In simple terms: Nucleotide transport is linked to other cellular activities.
Nucleotide transmembrane transport is often coupled to ion gradients, ATP hydrolysis, or other transport processes [1,4]. For example, mitochondrial carriers exchange nucleotides with other metabolites, integrating transport with metabolic pathways.
Key Genes Involved in GO:1901679 nucleotide transmembrane transport
The following genes encode proteins that mediate or regulate nucleotide transmembrane transport, as supported by published literature [1,2,3,4,5,6,7,8].
| Gene | Major Role | Research Relevance |
|---|---|---|
| CFTR | Nucleotide transport channel | Cystic fibrosis, epithelial transport [1,3] |
| SLC25A | Mitochondrial nucleotide carriers | Mitochondrial metabolism |
| ABCB4 | ABC transporter | Lipid and nucleotide transport |
| ABCD4 | Cobalamin transport | Inherited metabolic disorders |
| TMEM94 | Mg2+ uptake, ER homeostasis | ER function and disease |
| ATP1A1 | Na,K-ATPase | Ion transport and signaling |
| ABCB1 | ABC exporter | Drug resistance |
| ABCC7 | CFTR alias | Cystic fibrosis |
| SLC25A4 | Mitochondrial ADP/ATP carrier | Energy metabolism |
| SLC25A5 | Mitochondrial ADP/ATP carrier | Energy metabolism |
| SLC25A6 | Mitochondrial ADP/ATP carrier | Energy metabolism |
| ABCA1 | ABC transporter | Lipid trafficking |
| ABCG1 | ABC transporter | Lipid trafficking |
| ABCB11 | Bile salt export | Transport physiology |
| SLC25A10 | Mitochondrial dicarboxylate carrier | Metabolism |
| SLC25A12 | Mitochondrial aspartate/glutamate carrier | Metabolism |
| SLC25A13 | Mitochondrial aspartate/glutamate carrier | Metabolism |
How Is nucleotide transmembrane transport Regulated?
Nucleotide transmembrane transport is regulated by cellular energy status, ion gradients, and signaling pathways [1,4]. CFTR activity is modulated by phosphorylation and nucleotide binding [1,3]. Mitochondrial carriers are regulated by substrate availability and metabolic demands.
nucleotide transmembrane transport and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CFTR | Cystic fibrosis | Knockout and knock-in cell models |
| SLC25A4 | Mitochondrial myopathy | Knockout cells |
| ABCD4 | Cobalamin deficiency | Point mutation models |
| TMEM94 | ER homeostasis defects | Overexpression models |
Cystic Fibrosis
Mutations in CFTR impair nucleotide transport and epithelial ion balance, leading to cystic fibrosis [1,3].
Mitochondrial Disorders
Defects in mitochondrial nucleotide carriers disrupt energy metabolism and cause mitochondrial diseases.
Metabolic Disorders
Impaired nucleotide transport across organelle membranes contributes to metabolic dysfunction.
From nucleotide transmembrane transport-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CFTR affect nucleotide transport? | CFTR knockout cells |
| Can a point mutation alter substrate specificity? | Point mutation knock-in |
| Does overexpression increase transport rate? | Overexpression cell lines |
| Where is the transporter localized? | Tagged knock-in |
| What genes regulate nucleotide transport? | CRISPR library screening |
| Does the transporter interact with partners? | Knock-in with affinity tag |
How to Study the nucleotide transmembrane transport Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Radioactive uptake | Transport rate | Functional characterization |
| Patch-clamp | Ion currents | Channel activity [1,3] |
| Proteomics | Protein interactions | Complex identification |
| CRISPR screen | Gene essentiality | Pathway discovery |
| Live-cell imaging | Subcellular localization | Trafficking studies |
| Metabolomics | Nucleotide levels | Metabolic impact |
| Structural biology | Transporter conformation | Mechanism elucidation [1,4] |
Transport Assays
Radiolabeled or fluorescent nucleotide uptake assays measure transport activity across membranes [1,4].
Electrophysiology
Patch-clamp and two-electrode voltage clamp record currents associated with nucleotide transport [1,3].
Proteomics and Interactomics
Mass spectrometry identifies transporter complexes and post-translational modifications [5,6].
CRISPR Screening
Genome-wide knockout screens reveal genes required for nucleotide transmembrane transport.
How CRISPR Can Be Used to Study GO:1901679 nucleotide transmembrane transport
Knockout
CRISPR knockout of CFTR or mitochondrial carriers abolishes transport, enabling loss-of-function studies [1,4].
Point Mutation
Point mutations model disease-associated variants and test substrate specificity.
Knock-in
Knock-in of tagged transporters allows visualization and interaction studies.
Overexpression
Overexpression of transporters increases transport capacity for biochemical assays.
How EDITGENE Supports nucleotide transmembrane transport Research
Researchers studying nucleotide transmembrane transport-related genes often need to determine whether a candidate gene is causally involved in transport, and CRISPR-based models provide a direct way to test this [1,4,5,6,8].
Contact EDITGENE today to design your custom CRISPR model for nucleotide transmembrane transport research.
Frequently Asked Questions About nucleotide transmembrane transport
What is nucleotide transmembrane transport?
It is the directed movement of nucleotides across a membrane, defined by GO:1901679.
What genes are involved in nucleotide transmembrane transport?
Genes include CFTR, SLC25A family members, and ABC transporters [1,2,4].
How does CFTR transport nucleotides?
CFTR forms a channel that conducts nucleotides across epithelial membranes [1,3].
What diseases are linked to nucleotide transmembrane transport?
Cystic fibrosis and mitochondrial disorders are associated with defects in this process [1,4].
What is the role of mitochondrial carriers in nucleotide transport?
They exchange nucleotides across the inner mitochondrial membrane to support metabolism.
How can I study nucleotide transmembrane transport?
Use transport assays, electrophysiology, and CRISPR screens [1,4,8].
What are the synonyms for GO:1901679?
The synonym is nucleotide membrane transport.
Which ontology does GO:1901679 belong to?
It belongs to biological_process.
Can CRISPR be used to study nucleotide transporters?
Yes, knockout, knock-in, and overexpression models are available [5,6,8].
What is the definition of nucleotide transmembrane transport?
The directed movement of nucleotide across a membrane.
Conclusion
Nucleotide transmembrane transport (GO:1901679) is a fundamental biological process mediated by diverse transporters such as CFTR and mitochondrial carriers [1,4]. Its dysfunction is linked to cystic fibrosis and metabolic disorders, making it a key area of research [1,4]. CRISPR-based models and advanced screening methods continue to uncover new regulators and therapeutic targets [5,6,8].
References
- 1. Fuller CM et al.. 1992. CFTR!. Am J Physiol 263(2 Pt 1):C267-86 PMID: 1381146
- 2. Schmitz G et al.. 2000. ABC transporters in cellular lipid trafficking.. Curr Opin Lipidol 11(5):493-501 PMID: 11048892
- 3. Cantiello HF. 1997. Nucleotide transport through the cystic fibrosis transmembrane conductance regulator.. Biosci Rep 17(2):147-71 PMID: 9217964
- 4. Palmieri F et al.. 2010. Mitochondrial metabolite transport.. Essays Biochem 47:37-52 PMID: 20533899
- 5. Vishnu N et al.. 2024. ERMA (TMEM94) is a P-type ATPase transporter for Mg(2+) uptake in the endoplasmic reticulum.. Mol Cell 84(7):1321-1337.e11 PMID: 38513662
- 6. Imai M et al.. 2024. Transmembrane helix 6 of ABCD4 is indispensable for cobalamin transport.. J Inherit Metab Dis 47(2):366-373 PMID: 38069516
- 7. Kaplan JH. 2002. Biochemistry of Na,K-ATPase.. Annu Rev Biochem 71:511-35 PMID: 12045105
- 8. Pinkett HW. 2025. The Evolution of ABC Importers.. J Mol Biol 437(11):169082 PMID: 40089147
